Drinking mug



FIG. 1 is a front elevational view of a drinking mug showing my new design, the rear view being a mirror image thereof.

FIG. 2 is a side elevational view as seen from the right side of FIG. 1.

FIG. 3 is a plan view.

FIG. 4 is a side elevational view as seen from the left side of FIG. 1.

The bottom is substantially plain. 

The ornamental design for a drinking mug, as shown and described. 